Night Vision Explained
July 3, 2008
Night Vision Explained
by: Bill MacArthur
Spy movies are often the first thing that comes to mind when people think about or discuss night vision technology. Do they actually work, or are they another form of moviemaking magic? In case you were wondering, the technology is very real and very effective. The standard set of night vision goggles will allow you to see a person standing 200 yards away on a cloudy, moonless night. Impressive, isn’t it?
There are two different types of night vision technology. The first works on the principle of image enhancement. It works by collecting the minute amount of light contained in darkness, and amplifying it to the point where objects can be viewed. It even collects light from the lower end of the infrared light spectrum, which is generally imperceptible to the human eye.
The other way that night vision technology works is through a process known as thermal imaging. This process works by capturing the upper end of the infrared light spectrum. This part of the light spectrum is emitted in the form of heat, as opposed to light as we might recognize it. The warmer an object is the higher amount of this light is emitted.
4 Reasons Why Portable Mp3 Players Take Content to The Next Level
July 3, 2008
4 Reasons Why Portable Mp3 Players Take Content to The Next Level
by: Steve Gover
With the recent advent of the Ipod, a lot of people are using portable Mp3 players to carry their entire music collection around with them. What just a few years ago would have required you to lug a suitcase full of CDs around, now can fit in the palm of your hand. Some Ipods can carry up to 60Gb of songs (and now video) on a single miniature hard drive. The Ipod even looks cool and lights up like a magical glowing device. Besides Apple, numerous companies make portable Mp3 players
This doesn’t even begin to get into the phenomenon of podcasting. Podcasting is a simple concept with amazing utility for the average consumer. Imagine if you could take an audio broadcast of any sort (podcasting a teleseminar comes to mind) on the airplane with you on your next business trip.
1)You don’t have to be there when the teleseminar is held.
2)You can pause it, rewind it, fast forward the teleseminar to any point that you feel is important.
3)You can listen to it repeatedly.
Things To Look For When Buying A Cordless Microphone
July 1, 2008
Things To Look For When Buying A Cordless Microphone
by: Mantius Cazaubon
Wireless microphones have numerous uses, from amateur to professional, from bars and clubs to educational institutions and churches. A good, reliable wireless microphone system can be an excellent addition to any of the mentioned locations, but it can also be used on stage, during a concert, a prize contest, announcing a play or for karaoke. Radio and TV stations often use such cordless microphones with great success. There are several frequency ranges in which you can get a microphone: VHF, UHF and Giga Hertz. Cordless microphones may also take shapes like hand held wireless microphones or clip-on microphones.
Advantages and potential problems of cordless microphones
Pet Safefy Lights
June 29, 2008
Pet Safefy Lights
by: Marvin Badler
Is your pet’s world truly safe? Pet Safety Lights are designed for all pets with owners who care.
Responsible and caring pet owners are bound to appreciate the extra protection provided for their pets during evening walks and nighttime runs. The PET Blinkie allows the owner and others i.e. drivers, etc. - to see your pet from greater distances, therefore assuring additional stopping and swerving time. Many pets are accidentally injured and killed by vehicles, motorcycles, skateboards and bicycles. Now you can minimize or prevented this with the new Pet Blinke Illuminated Dog Collars.
If you love your pet, you will love the Pet Blinkie. Pet Blinkie is vibrant, multi-color lights that attach easily to a collar, leash or harness. Pet Blinkie is waterproof and visible up to 1/2 mile away. Available in seven blinking, vibrant colors.
Things To Look For When Buying A Studio Microphone
June 28, 2008
Things To Look For When Buying A Studio Microphone
by: Mantius Cazaubon
Studio microphones need to accomplish one thing and one thing only: to record the best possible voice or musical instrument sounds. In order to do that, they use advanced technological methods to filter out unwanted ambient sound, which are present even in a controlled studio environment. Studio microphones have to capture the smallest voice subtleties and even the lowest musical notes. Most studio microphones use the electret model, in which a thin metal diaphragm receives sound waves and converts them into electrical current, which can then be interpreted by various recording devices. The filters used in the manufacturing of professional studio microphones are well calibrated, so that any disturbances are stopped before they reach the recording surface.
No room for compromise
The Types Of Camcorders
June 27, 2008
The Types Of Camcorders
by: Richard Gazzo
Types of camcorders
If you are planning on purchasing a camcorder, you should be familiar with the types of camcorders and how they can benefit your specific needs. The formats of video cameras include, VHS, VHS-C, 8mm, Hi8, Mini Digital Video (Mini DV), DVD and Digital 8. Each format has its pros and cons
VHS
The VHS format is the oldest type of camcorder. This type of video camcorder is fast becoming outdated, because you can only play back the video on a VHS VCR system. VHS camcorders are not nearly as clear as digital video camcorders that offer clear video with 540 lines of resolution, VHS video cameras only offer 240 lines of resolution. They also weigh more and are much more bulky, that dv camcorders. You can only find these video camera used because their technology is now outdated.
VHS-C
The VHS-C format offer 240 lines of resolution, just like VHS. These analog camcorders come in a smaller size that the VHS camcorder models, but use the same technology. The video tapes used in VHS-C camcorders are much smaller in size than VHS, just in a smaller camcorder design. VHS-C is considered old technology and not used today in newer models.
How a microphone works
June 25, 2008
How a microphone works
by: Mantius Cazaubon
Microphones are transducers, devices that change information from one form to another. They detect sound information as air pressure patterns, which they interpret and “translate” into electric current patterns. The accuracy of this transformation provides a better or worse sound. Magneto dynamic microphones have a thin metallic surface (like a diaphragm) and a coiled metal wire attached to it. When the coil is in motion, due to the magnetic field surrounding the coil, current flow is facilitated. The amount of current is determined by the frequency and speed of the motion of the diaphragm, caused by the incoming air patterns. These groups of microphones are known as velocity sensitive devices. Here are some of the most important characteristics involved in making the microphone work:
The microphone sensitivity
This measures the amount of electrical output that is produced by a particular sound. Low and short sounds cannot be recorded unless the sensitivity levels are high enough to capture them. Quiet sounds and musical instruments require higher sensitivity microphones. Otherwise you have to increase microphone gain levels and the sound receives a certain amount of distorting noise.
Microphone overload
Know Where Your Trucks Are With GPS Fleet Tracking Companies
June 23, 2008
Know Where Your Trucks Are With GPS Fleet Tracking Companies
by: J Herrera
Would you like to know where your fleet is at any time? GPS fleet tracking companies offer you a powerful system that allows you to control and manage your mobile resources wherever you are.
It is a great way for fleet owners and managers to monitor their cars, trucks or vehicles efficiently. GPS fleet tracking companies will allow you to monitor your employees and vehicles with assurance and confidence. With this system in your company’s fleet vehicles, you will find the best way to conduct fleet management and track your vehicles. It really doesn’t matter if you have one truck or one thousand trucks, our trusty GPS fleet consultants can assist you in selecting a vehicle tracking system that will become a competitive advantage for your company. Know where they go at every moment! With the services of GPS fleet tracking companies in your cars and trucks will allow you to get the facts you need.
GPS fleet tracking companies allow you to see your fleet from a Windows based PC connected to the Internet, and it is as simple to run as leading Internet services such as AOL. This vehicle tracking unit costs hundreds less than other GPS tracking systems and it can be installed very easily in any vehicle.
Comparing Digital Camera Features
June 22, 2008
Comparing Digital Camera Features
by: Steve Gargin
More people are able to afford digital cameras because their prices are falling but the number of characteristics is rising so it is important to be able to compare digital camera features.
The first step in being able to compare digital camera features is to decide what you want to get out of your camera. If you compare digital camera prices you will see that for shooting family snapshots you can get a good basic digital camera for under $400, while a professional model is over $2,000. When you compare digital camera features you need to know the extent of the use you are going to get out of it.
It is essential when you compare digital camera options to understand the issues of image resolution, which is measured in megapixels. Basically, the more megapixels, the higher the resolutions of the final image but you definitely need to compare digital camera images with your actual requirements. This is best done if you compare digital camera resolution with the size of the images that you want to print and you will find that a 1-mg camera can create a 3-by-5-inch (7.5 by 13 cm) photo-quality print; a 2-mg camera will make a 5-by-7-inch (13 by 18 cm) print; a 3-mg camera will make an 8-by-10-inch (20 by 25 cm) print, and a 6-mg camera will make a 9-by-13-inch (23 by 33 cm) print.
Find All The GPS Systems Information You Need
June 21, 2008
Find All The GPS Systems Information You Need
by: J Herrera
Are you looking for some GPS systems information? Then come to see us. We have been providing technical courses and advanced GPS training on GPS systems information since a long time ago. We offer more than 20 courses on professional GPS and all you want to know about GPS systems information.
But, first than anything, what is exactly a Global Positioning System (GPS)?
It is a satellite-based navigation system made up of a network of 24 satellites placed into orbit by the U.S. Department of Defense. At first, GPS was going to be used by military applications, but later in the 1980s, the government allowed it to be available for civilian use. It doesn’t matter the weather conditions, GPS keeps working anywhere in the world and the whole day. It is not necessary any subscription fees or setup charges to use GPS.
The second question would be: How it works?
